arc.xxx.extension
arc.example.material [(html/xml, ajax, js+py call-function/command for reverse/contra-recursion, so as to call-back the complete, foremost antecedent/(or, first logical antonym, in a sense)] for the ‘extension’ of the web3/5 URL/domain-name/postscript, per se… kind of sort of like the get-function for HTML browser behavior… CSS/PHP (4 < (?)) possible?... HTML5 as complete replacement so as/due to graphical frame-rate “exploit”-ability, compiling and executing and running multi-/different run-time and coding environs/languages at once… all in one same page/browser window/session?....